Baxi MULTIFIT Flue Systems User Manual

© Baxi Heating UK Ltd 2011
GUIDANCE NOTES
Flue Accessories & Fitting Guide
Ø 60/100 Flue Systems
Ø 80/125 Flue Systems
Ø 80/80 Twin Flue Systems
Plume Displacement Kit
(Ø 60/100 Flue Systems)
READ THESE INSTRUCTIONS IN CONJUNCTION WITH THE BOILER
INSTALLATION INSTRUCTIONS BEFORE FITTING THE FLUE
Please leave these instructions with the
Installation & Servicing Instructions.
IMPORTANT NOTE: This document
will assist in the correct installation of
the various flue & chimney systems
described within. However, it is the
responsibility of the installer/Gas Safe
registered commissioning engineer to
ensure that the flue & chimney system
is fitted safely and in compliance with
the relevant standards and practices in
force in the country of installation.

Baxi MULTIFIT Flue Systems Specifications

General

Brand	Baxi
Model	MULTIFIT Flue Systems
Category	Accessories
Language	English

Summary

Flue Accessories and Fitting Guide

General Installation Guidance

Key instructions for flue installation, to be read with boiler manuals before fitting.

Important Installation Notes

General System Requirements

Concentric Flue System (60/100) Installation

Supports and Securing Flue Extensions

Guidelines for using support brackets and securing flue extensions for 60/100mm systems.

Cutting and Assembling Flue Extensions

Flue Options and Terminal Positioning

Flue Terminal Spacing Requirements

Minimum distances for flue terminals from boundaries, openings, and surfaces.

Flue Length Calculations and 80/125 System

Equivalent Length Calculation for Concentric Flues

Explains calculating total equivalent flue length for concentric systems using tables and diagrams.

80/125 Flue System Adaptor Installation

Ridge Flue Terminal Installation

Special Considerations for Ridge Terminals

Notes on fitting ridge terminals in new build and retrofit situations, and roof structure integrity.

80/80 Twin Flue System Adaptor Fitting

Twin Pipe Flue System (80/80) Connection

Supports, Securing, and Cutting Extensions

Twin Pipe System Assembly and Loft Installation

Twin Pipe System Assembly

Air Inlet in Loft Space Requirements

Ventilation, clearance, and isolation rules for air inlet terminals installed in loft spaces.

Plume Displacement Kit (PDK) Accessories and Fitting

Plume Displacement Accessories

Fitting the Plume Displacement Kit

Step-by-step guide for installing the PDK kit, including replacement of standard terminals and extension cutting.

Plume Displacement Kit (PDK) Clearance Requirements

PDK Outlet and Inlet Height Requirements

Specifies minimum height requirements for PDK outlets (2m) and inlets (300mm) above ground/balcony levels.

PDK Outlet Angle and Terminal Guard

Permissible Lengths for PDK Systems

Understanding Permissible Length Graphs

Explains how to use graphs to determine permissible lengths for concentric and exhaust flue components in PDK systems.

Graph Suitability for Boiler Models